Can BitmapData.CopyPixels method with many objects be faster?

I'm trying to know if you can copy the pixels of many objects in one BitmapData without a huge slowdown.
The slow down is made by calling the method multiple times, thus making a lot of variable declaration and disposal for the garbage collector.
If someone know how to either immitate the copyPixel method or have any other way of solving this problem, i would gladly appreciate it
thanks,
Dominik

I also calculated something bugging me with the garbage collector
here are my results for declaring a class variable and not natives like ints,Number...
1.looping 600 time while declaring one simple local variable: 0ms
2.looping 1200 time while declaring one simple local variable: 1ms
3.looping 2400 time while declaring one simple local variable: 1-2ms
4.looping 4800 time while declaring one simple local variable: 3-4ms
5.looping 9600 time while declaring one simple local variable: 6-7ms
6. 3x 5.looping 9600 time=looping 28800 time while declaring one simple local variable 20-21 ms
vs printing one pixel with CopyPixel
1200 time :2
2400 time :4
4800 time :7
9600 time :14-15
28800 time :41ms
vs printing one pixel with SetPixel
1200 time ; 0
2400 time : 0
4800 time : 1
9600 time : 2
28800 time :7ms
Something seems to take a huge time to execute for CopyPixel and i suspect some declaration and class variable.
I think using SetPixel for particles is the best but SetPixel is not doing a job that the CopyPixel is doing:
Its deciding what pixels are overwritten and those that are not buts its also doing whats setPixel does.
So if we substract the time spent for setting a pixel for all the CopyPixel results it shows that :
9600 time :(14-15) - 2 = (12-13) ms
28800 time :41ms -7 = 34 ms
copyPixel still takes a good proportion at executing the rest of the code and it cant possibly be that long for setting only that many pixels

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Message was edited by:
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temporarily ;-)
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Hi, everyone:
I'm a little shy to ask this question, however, it's been hanging in my mind for so long, so I think I'd rather make a confession on it. You may laugh at me if you want, I'm ready for that, but I more look forward to that someone can really give me the light, or even the link, or some hint....
For your ease of reading, I give the question first, and my whole story behind:
When I need a method which can provide more than one result( in other words, multiple outputs), how can I do it in Java? As I know, either you pass and object, or the result of the function is an object will do , for the object contains the datas you want, but that means your needs for those data have to be defined in object format in advance, won't that be inconvinient? Or Java has a better solution for that?
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Thanks!!
aQunx from Taiwan

You missed the most common OO solution - separation of concerns and implementation hiding.
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If you have a function which returns a real, that is a different method of the object.
If both functions require common code, move that into a private method which is called by both. If the method is costly, cache the result.
eg an aerodynamics properties class, which could be done as a multivalued return of (lift, drag), refactored to independent lift() and drag() methods, which delegate to an interpolate() method, which caches the interpolated value and uses mach, pressureHeight and _alpha to determine whether it should recalculate: /**
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Override method on an object construted by somebody

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miro_connect wrote:
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struct Count
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is within WD UI Element availablw where by I can display a text with many lines ?
Regards
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Data: l_elem type ref to if_wd_context_element.
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Regards,
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Can you help me with mouse pressed method please?

hi
can you help me with my problem please, player label doesn't show up in the applet and the draw string method it doesn't draw any strings like X or O for the game I don't know what is the problem maybe it is with MousePressed method which is in Board class. I tried to write the code of the location many times I'm not sure if the problem comes from there.
there is no error in my code, but it doesn't work.
this is class Board which has the mouseListener
class Board extends JPanel implements MouseListener, MouseMotionListener
 private JLabel playerlabel;
 private boolean play;
 private boolean start;
 private int turn;
 private Square squares[][];
private Player myplayer[][];
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 //playerlabel.setLayout(null);
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 add( playerlabel );
 play = true;
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 squares = new Square[3][3];
 myplayer = new Player[3][3];
 int x = 40;
 int y = 40;
 for (int i=0; i<3; i++){
 x = 40;
 for (int j=0; j<3; j++){
 Square s = new Square( x,y );
 squares[i][j] = s;
 x +=50;
 y +=50;
 this.addMouseListener(this);
 this.addMouseMotionListener(this);
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 public void mouseMoved( MouseEvent event ){}
 public void mouseEntered( MouseEvent event ){}
 public void mouseExited( MouseEvent event ){}
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 {int xPos = event.getX();
 int yPos = event.getY();
 if(play && turn ==1){
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 int x = squares[i][j].getX();
 int y = squares[i][j].getY();
 if(xPos> x && xPos<x+40&& yPos> y && yPos<y+40){
 if( squares[i][j].getOccupied() ==0 ){
 String ptext;
 ptext = "X";
 Player p = new Player(x, y,ptext);
 myplayer[i][j] = p;
 squares[i][j].setOccupied(1);
 playerlabel.setText( "O Player Turn" );
 turn = 2;
 repaint();
 Win();
 else{
 turn = 2;
 playerlabel.setText( "O Player Turn" );
 repaint();
 if ( play && turn ==2 )
for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 int x = squares[i][j].getX();
 int y = squares[i][j].getY();
 if(xPos> x && xPos<x+40&& yPos> y && yPos<y+40){
 if( squares[i][j].getOccupied() ==0 ){
 String ptext;
 ptext = "O";
 Player p = new Player(x, y,ptext);
 myplayer[i][j] = p;
 squares[i][j].setOccupied(2);
 playerlabel.setText( "X Player Turn" );
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 repaint();
 Win();
 else{
 turn = 1;
 playerlabel.setText( "X Player Turn" );
 repaint();
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 public void mouseDragged( MouseEvent event )
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 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[1][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[1][2].getOccupied() &&squares[1][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
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 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if(squares[0][0].getOccupied() == squares[0][1].getOccupied() &&squares[0][1].getOccupied()==squares[0][2].getOccupied() &&squares[0][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[1][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[1][2].getOccupied() &&squares[1][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if(squares[2][0].getOccupied() == squares[2][1].getOccupied() &&squares[2][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 //Vertically win
 if (squares[0][0].getOccupied() == squares[1][0].getOccupied() &&squares[1][0].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[0][1].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][1].getOccupied() &&squares[2][1].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if(squares[0][2].getOccupied() == squares[1][2].getOccupied() &&squares[1][2].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if (squares[0][0].getOccupied() == squares[1][0].getOccupied() &&squares[1][0].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[0][1].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][1].getOccupied() &&squares[2][1].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if(squares[0][2].getOccupied() == squares[1][2].getOccupied() &&squares[1][2].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 //Diagonal win
 if (squares[0][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[0][2].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if (squares[0][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[0][2].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 }//end win
public void setTurn(int t)
 turn = t;
 playerlabel.setText( "X Player Plays First" );
 public void paintComponent( Graphics g )
 super.paintComponent( g );
 this.setBackground( Color.WHITE );
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 g.setColor( Color.BLACK );
 g.drawRect( squares[i][j].getX(), squares[i][j].getY(), 50, 50 );
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 myplayer[i][j].draw(g);
 //End of paintComponent
}and this is the whole code of my program.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class Player{
 private int xCoordinate;
 private int yCoordinate;
 private String playerText;
public Player(int x, int y, String t)
 playerText = t;
 xCoordinate = x;
 yCoordinate = y;
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 g.drawString(playerText, xCoordinate, yCoordinate);
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 { playerText = t;
}//end player
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 private int x;
 private int y;
 private int occupied;
 public Square(int x1, int y1)
 x = x1;
 y= y1;
 occupied = 0;
 public void setX(int x1)
 x = x1;
 public int getX()
 return x;
 public void setY(int y1)
 y = y1;
 public int getY()
 return y;
 public void setOccupied(int o)
 occupied = o;
 public int getOccupied()
 return occupied;
public class TicTac extends JApplet implements ActionListener
{ private JPanel panel;
 private JButton newgame;
 private Board B;
 public void init()
 B = new Board();
 add( B, BorderLayout.CENTER );
 panel = new JPanel();
 newgame = new JButton( "New Game" );
 panel.add( newgame);
 add( panel, BorderLayout.SOUTH );
 newgame.addActionListener(this);
 public void actionPerformed( ActionEvent ev)
 { Object source = ev.getSource();
 if (source == newgame)
 {remove(B);
 repaint();
 B = new Board();
 add( B, BorderLayout.CENTER );
 B.setTurn(1);
 repaint();
 validate();
 }//end class TicTac
class Board extends JPanel implements MouseListener, MouseMotionListener
 private JLabel playerlabel;
 private boolean play;
 private boolean start;
 private int turn;
 private Square squares[][];
private Player myplayer[][];
 public Board()
 setBackground( Color.WHITE );
 playerlabel = new JLabel( "X player first" );
 //playerlabel.setLayout(null);
 // playerlabel.setLocation(500,500);
 add( playerlabel );
 play = true;
 turn = 1;
 squares = new Square[3][3];
 myplayer = new Player[3][3];
 int x = 40;
 int y = 40;
 for (int i=0; i<3; i++){
 x = 40;
 for (int j=0; j<3; j++){
 Square s = new Square( x,y );
 squares[i][j] = s;
 x +=50;
 y +=50;
 this.addMouseListener(this);
 this.addMouseMotionListener(this);
 public void mouseClicked( MouseEvent event ){}
 public void mouseMoved( MouseEvent event ){}
 public void mouseEntered( MouseEvent event ){}
 public void mouseExited( MouseEvent event ){}
 public void mousePressed( MouseEvent event )
 {int xPos = event.getX();
 int yPos = event.getY();
 if(play && turn ==1){
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 int x = squares[i][j].getX();
 int y = squares[i][j].getY();
 if(xPos> x && xPos<x+40&& yPos> y && yPos<y+40){
 if( squares[i][j].getOccupied() ==0 ){
 String ptext;
 ptext = "X";
 Player p = new Player(x, y,ptext);
 myplayer[i][j] = p;
 squares[i][j].setOccupied(1);
 playerlabel.setText( "O Player Turn" );
 turn = 2;
 repaint();
 Win();
 else{
 turn = 2;
 playerlabel.setText( "O Player Turn" );
 repaint();
 if ( play && turn ==2 )
for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 int x = squares[i][j].getX();
 int y = squares[i][j].getY();
 if(xPos> x && xPos<x+40&& yPos> y && yPos<y+40){
 if( squares[i][j].getOccupied() ==0 ){
 String ptext;
 ptext = "O";
 Player p = new Player(x, y,ptext);
 myplayer[i][j] = p;
 squares[i][j].setOccupied(2);
 playerlabel.setText( "X Player Turn" );
 turn = 1;
 repaint();
 Win();
 else{
 turn = 1;
 playerlabel.setText( "X Player Turn" );
 repaint();
 public void mouseReleased( MouseEvent event )
 public void mouseDragged( MouseEvent event )
 public void Win(){
 if(squares[0][0].getOccupied() == squares[0][1].getOccupied() &&squares[0][1].getOccupied()==squares[0][2].getOccupied() &&squares[0][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[1][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[1][2].getOccupied() &&squares[1][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if(squares[2][0].getOccupied() == squares[2][1].getOccupied() &&squares[2][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if(squares[0][0].getOccupied() == squares[0][1].getOccupied() &&squares[0][1].getOccupied()==squares[0][2].getOccupied() &&squares[0][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[1][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[1][2].getOccupied() &&squares[1][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if(squares[2][0].getOccupied() == squares[2][1].getOccupied() &&squares[2][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 //Vertically win
 if (squares[0][0].getOccupied() == squares[1][0].getOccupied() &&squares[1][0].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[0][1].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][1].getOccupied() &&squares[2][1].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if(squares[0][2].getOccupied() == squares[1][2].getOccupied() &&squares[1][2].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if (squares[0][0].getOccupied() == squares[1][0].getOccupied() &&squares[1][0].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[0][1].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][1].getOccupied() &&squares[2][1].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if(squares[0][2].getOccupied() == squares[1][2].getOccupied() &&squares[1][2].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 //Diagonal win
 if (squares[0][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 else if (squares[0][2].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 1)
 {playerlabel.setText("Player 1 X WON THE GAME!");
 play =false; }
 if (squares[0][0].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][2].getOccupied() &&squares[2][2].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 else if (squares[0][2].getOccupied() == squares[1][1].getOccupied() &&squares[1][1].getOccupied()==squares[2][0].getOccupied() &&squares[2][0].getOccupied() == 2)
 {playerlabel.setText("Player 2 O WON THE GAME!");
 play =false; }
 }//end win
public void setTurn(int t)
 turn = t;
 playerlabel.setText( "X Player Plays First" );
 public void paintComponent( Graphics g )
 super.paintComponent( g );
 this.setBackground( Color.WHITE );
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 g.setColor( Color.BLACK );
 g.drawRect( squares[i][j].getX(), squares[i][j].getY(), 50, 50 );
 for (int i=0; i<3; i++){
 for (int j=0; j<3; j++){
 myplayer[i][j].draw(g);
 //End of paintComponent
 Edited by: mshadows on May 18, 2008 7:53 AM

I was playing with this a little bit and came up with this game model, something that I'm sure can be improved upon greatly:
TttXO.java
an enum to encapsulate X vs O. I could use a boolean here since it has 2 states, but this seems more intuitive to me
package dy08.m05.ttt;
* tic tac toe encapsulation of X vs O
* @author Pete
public enum TttXO
 X, O
}TttCell.java
encapsulates an individual cell in the tictactoe grid.
package dy08.m05.ttt;
* Tic Tac Toe Game cell
* can be occupied or not
* can hold TttXO X or O or null
* @author Pete
public class TttCell
 private boolean occupied = false;
 private TttXO xo = null;
 public TttCell()
 * sets a Square for either x or o
 * @param TttXO
 * @return true if successful, false if already occupied
 public boolean setXO(TttXO xo)
 if (occupied)
 return false;
 else
 occupied = true;
 this.xo = xo;
 return true;
 public void reset()
 occupied = false;
 xo = null;
 public boolean isOccupied()
 return occupied;
 public TttXO getXO()
 return xo;
 // used to test and debug the class
 public String toString()
 if (occupied)
 return xo.toString();
 else
 return "-";
package dy08.m05.ttt;
* Tic Tac Toe game model
* @author Pete
public class TttGameModel
 private TttCell[][] cellGrid = new TttCell[3][3];
 private boolean xTurn = true;
 private boolean win = false;
 public TttGameModel()
 for (int i = 0; i < cellGrid.length; i++)
 for (int j = 0; j < cellGrid.length; j++)
cellGrid[i][j] = new TttCell();
public void reset()
xTurn = true;
win = false;
for (int i = 0; i < cellGrid.length; i++)
for (int j = 0; j < cellGrid[i].length; j++)
cellGrid[i][j].reset();
public boolean isXTurn()
return xTurn;
public boolean isWin()
return win;
* @param row
* @param col
* @return true if valid move, false if game already over or cell occupied
public boolean takeTurn(int col, int row)
TttXO currentXO = TttXO.O;
TttCell cell = cellGrid[row][col];
if (win)
return false;
if (cell.isOccupied())
return false;
if (xTurn)
currentXO = TttXO.X;
cell.setXO(currentXO);
win = checkWin(col, row, currentXO);
xTurn = !xTurn; // toggle xturn
return true;
public boolean checkWin(int col, int row, TttXO xo)
boolean win = false;
// first rows and columns
boolean temp = true;
for (int i = 0; i < 3; i++)
temp &= cellGrid[row][i].getXO() == xo;
win |= temp;
temp = true;
for (int i = 0; i < 3; i++)
temp &= cellGrid[i][col].getXO() == xo;
win |= temp;
if (row == col) // if slash diagonal
temp = true;
for (int i = 0; i < 3; i++)
temp &= cellGrid[i][i].getXO() == xo;
win |= temp;
if (row + col == 2) // if backslash diagonal
temp = true;
for (int i = 0; i < 3; i++)
temp &= cellGrid[i][2 - i].getXO() == xo;
win |= temp;
return win;
// used to test and debug the class
public String toString()
StringBuilder sb = new StringBuilder();
for (int i = 0; i < cellGrid.length; i++)
for (int j = 0; j < cellGrid[i].length; j++)
sb.append(cellGrid[i][j] + " ");
sb.append("\n");
if (win)
sb.append("win! Game over");
else
sb.append("No winner yet");
return sb.toString();
// test the class
public static void main(String[] args)
TttGameModel model = new TttGameModel();
checkMove(model, 0, 0);
checkMove(model, 1, 0);
checkMove(model, 1, 1);
checkMove(model, 2, 0);
checkMove(model, 1, 0); // bad move
checkMove(model, 2, 2);
// to test the class
private static void checkMove(TttGameModel model, int i, int j)
System.out.println("OK move: " + model.takeTurn(i, j));
System.out.println(model + "\n");

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